Image : Applied Ocean Physics & Engineering

Tim Stanton and colleagues have used broadband sound to identify fish of different sizes. Through a resonance classification technique that uses broadband sound to resonate fish swimbladders, fish of 2-5 cm length were observed to be collocated with predator species of 15-30 cm length. This observation, which could not otherwise be detected through conventional acoustics systems, led to new understanding of biological processes associated with the cost-benefit tradeoff in predator-prey relationships.